Geology and Landslide Risk Assessment

A natural event caused by geological processes that can cause harm to people or property. Examples include landslides, earthquakes, and volcanic eruptions.

A landslide triggered by heavy rainfall. It occurs when the soil becomes saturated with water, making it unstable and prone to failure.

Factors that contribute to landslides include: steep slopes, weak soil, weathered rocks, and overloading of the slope.

Using satellites to monitor and evaluate areas prone to landslides. This helps in identifying and understanding landslide risks.

Different ways a landslide can occur, each with distinct characteristics. Examples include slides, flows, and falls.

A type of landslide where rocks or soil detach from a steep slope and fall vertically, often due to gravity or undercutting.

Landslide where a block of rock or soil rotates forward and falls, typically caused by undercutting or slope instability.

A landslide where a mass of rock or soil moves downslope along a defined surface. It's often triggered by rainfall or earthquakes.

A landslide where soil or rock moves horizontally outward from a central point, typically caused by groundwater pressure or seismic activity.

A landslide where soil or rock mixes with water and flows downhill like a viscous fluid. It's common in areas with heavy rainfall or snowmelt.

A depression in the ground that forms when the underlying rock dissolves, creating a void that collapses.

The process where rock dissolves, usually due to acidic water, creating voids in the ground.

The process where sediments over time fill pre-existing cavities underneath the ground, leading to erosion and eventual collapse.

A type of sinkhole that forms when the overlying soil collapses into a pre-existing void in the underlying rock.

A slow, gradual subsidence of the ground where sediments slowly erode into cavities below, leading to a sinkhole.

Carbonic acid, formed by the reaction of carbon dioxide in the atmosphere with water, dissolves rocks, leading to sinkhole formation.

Sinkholes form as the underlying rock is dissolved by acidic groundwater, which is also a source of drinking water for many communities.

Trade winds are persistent winds that blow towards the equator from the subtropics. They play a crucial role in typhoon formation.

The Convective Theory suggests that warm, moist air rises due to instability, forming an area of low pressure. This draws in surrounding air, leading to a cyclonic circulation.

Earth's rotation, along with the outward flow of air from the center of the storm at high levels, contributes to strengthening the low pressure and forming a swirling pattern.